| 摘要 |
PURPOSE:To reproduce an address with no influence due to an error by recording the same addresses in plural address parts and recording periodical digital signals in respective borders between the same addresses. CONSTITUTION:Data are recorded in a disc by recording light modulated by digital data from an optical head. Each of plural tracks on the disc is divided into plural sectors 0-19. Each sector has an address part and a data part and the address part is previously recorded in the disc. The same addresses 0-2 are successively recorded in the address part, a signal SYNC is located on the head and an address mark, a track number, a sector number, and a CRC code are successively arranged. The signals SYNCs are located between the addresses 0 and 1 and between the addresses 1 and 2 respectively and the signals SYNCs are pulse signals having frequency equal to that of the signal SYNC on the head of the address part. Thus, the out-of-cycle of a bit is prevented to obtain address reproduction. |
